Making the serial echo thing a smidge more interesting

arduino/SerialEcho/SerialEcho.ino

@@ -1,13 +1,28 @@
 const unsigned int BAUD_RATE = 9600;
+unsigned int keys = 0;
 
 void setup() {
-  Serial.begin(BAUD_RATE);
+    Serial.begin(BAUD_RATE);
+    Serial.print("> ");
 }
 
 void loop() {
-  if (Serial.available() <= 0) {
-    return;
-  }
+    if (Serial.available() <= 0) {
+        return;
+    }
 
-  Serial.write(Serial.read());
+    Serial.write(Serial.read());
+    keys++;
+
+    if (keys == 100) {
+        Serial.println("\nKABOOM!!!");
+        keys = 0;
+        Serial.print("> ");
+        return;
+    }
+
+    Serial.println("");
+    Serial.print(keys);
+    Serial.println(" keys pressed");
+    Serial.print("> ");
 }